Results 61 to 70 of about 9,197,165 (214)

HerS-3: An Exceptional Einstein Cross Reveals a Massive Dark Matter Halo

The Astrophysical Journal
We present a study of HerS-3, a dusty star-forming galaxy at z _spec  = 3.0607, which is gravitationally amplified into an Einstein cross with a fifth image of the background galaxy seen at the center of the cross.
P. Cox, K. M. Butler, C. R. Keeton, L. Eid, E. Borsato, T. J. L. C. Bakx, R. Neri, B. M. Jones, P. Prajapati, A. J. Baker, S. Berta, A. Cooray, E. M. Corsini, L. Marchetti, A. Omont, A. Beelen, R. Gavazzi, D. Ismail, R. J. Ivison, M. Krips, M. D. Lehnert, H. Messias, D. Riechers, C. Vlahakis, A. Weiss, P. van der Werf, C. Yang   +26 more
doaj   +1 more source

Halo occupation distribution estimation performance for LSST data

Astronomy & Astrophysics
Context. Upcoming imaging surveys, such as the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST), will enable high signal-to-noise measurements of galaxy clustering.
Cataldi P., Cristiani V., Rodriguez F., Taverna A., Artale M. C., Levine B., Wu H.   +6 more
doaj   +1 more source

A Physically Motivated Framework to Compare Pair Fractions of Isolated Low- and High-mass Galaxies across Cosmic Time

The Astrophysical Journal
Low-mass galaxy pair fractions are understudied, and it is unclear whether low-mass pair fractions evolve in the same way as more massive systems over cosmic time. In the era of JWST, Roman, and Rubin, selecting galaxy pairs in a self-consistent way will
Katie Chamberlain, Gurtina Besla, Ekta Patel, Vicente Rodriguez-Gomez, Paul Torrey, Garreth Martin, Kelsey Johnson, Nitya Kallivayalil, David Patton, Sarah Pearson, George Privon, Sabrina Stierwalt   +11 more
doaj   +1 more source

The properties of fossil groups of galaxies [PDF]

Astronomische Nachrichten, 2009
AbstractNumerical simulations as well as optical and X‐ray observations over the last few years have shown that poor groups of galaxies can evolve to what is called a fossil group. Dynamical friction as the driving process leads to the coalescence of individual galaxies in ordinary poor groups leaving behind nothing more than a central, massive ...
Eigenthaler, Paul, Zeilinger, Werner W.
openaire   +2 more sources

Project AMIGA: The Inner Circumgalactic Medium of Andromeda from Thick Disk to Halo

The Astrophysical Journal
The inner circumgalactic medium (CGM) of galaxies, where disk and halo processes intersect, remains poorly characterized despite its critical role in regulating galaxy evolution.
Nicolas Lehner, J. Christopher Howk, Lucy Collins, Sameer, Bart P. Wakker, Ramona Augustin, Kathleen A. Barger, Michelle A. Berg, Rongmon Bordoloi, Thomas M. Brown, Frances H. Cashman, Claude-André Faucher-Giguère, Andrew J. Fox, David M. French, Karoline M. Gilbert, Puragra Guhathakurta, John M. O’Meara, Brian W. O’Shea, Molly S. Peeples, D. J. Pisano, J. Xavier Prochaska, Jonathan Stern, Jason Tumlinson, Jessica K. Werk, Benjamin F. Williams   +24 more
doaj   +1 more source

Galaxy groups within voids

Astronomy & Astrophysics
Context. Despite cosmic voids being vast and almost empty, galaxy aggregations do exist within them, although they are much sparser than in denser regions like walls, filaments, and clusters.
Argudo-Fernández M., Torres-Ríos G., Vásquez-Bustos P., Verley S., Pérez I., Duarte Puertas S., Jiménez A., García-Benito R., Zurita A., Alcázar-Laynez M., Bidaran B., Conrado A., Espada D., Florido E., González Delgado R., Hernández-Sánchez M., del Moral-Castro I., Román J., Sánchez-Menguiano L., Subramanian S., Villalba-González P.   +20 more
doaj   +1 more source

A Group of Galaxies at Redshift 2.38 [PDF]

The Astrophysical Journal, 1996
Accepted for publication in ApJ (Feb 1st 1996 issue). 23 pages, uuencoded compressed tar postscript figures (1.4 Mbytes).
Francis, Paul J., Woodgate, Bruce E., Warren, Stephen J., Møller, Palle, Mazzolini, Margaret, Bunker, Andrew J., Lowenthal, James D., Williams, Ted B., Minezaki, Takeo, Kobayashi, Yukiyasu, Yoshii, Yuzuru   +10 more
openaire   +4 more sources

Revisiting Ram Pressure Stripping in Wolf–Lundmark–Melotte: No Evidence for Stripped H I with Local Group L-Band Survey

The Astronomical Journal
We analyze H i 21 cm observations of the Local Group dwarf galaxy Wolf–Lundmark–Melotte (WLM) from the Local Group L -Band Survey to search for evidence of ram pressure stripping.
Daniel R. Rybarczyk, Eric W. Koch, Fabian Caballero Vargas, Snežana Stanimirović, Nickolas M. Pingel, Julianne J. Dalcanton, Adam K. Leroy, Erik W. Rosolowsky, Michael P. Busch, Chang-Goo Kim, Adam Smercina, Elizabeth Tarantino, Vicente Villanueva, Alberto D. Bolatto, Thomas G. Williams   +14 more
doaj   +1 more source

Groups and Protocluster Candidates in the CLAUDS and HSC-SSP Joint Deep Surveys

The Astrophysical Journal, 2022
Using the extended halo-based group finder developed by Yang et al., which is able to deal with galaxies via spectroscopic and photometric redshifts simultaneously, we construct galaxy group and candidate protocluster catalogs in a wide redshift range (0
Qingyang Li, Xiaohu Yang, Chengze Liu, Yipeng Jing, Min He, Jia-Sheng Huang, Y. Sophia Dai, Marcin Sawicki, Stephane Arnouts, Stephen Gwyn, Thibaud Moutard, H. J. Mo, Kai Wang, Antonios Katsianis, Weiguang Cui, Jiaxin Han, I-Non Chiu, Yizhou Gu, Haojie Xu   +18 more
doaj   +1 more source

Clustering and redshift-space distortions in QSO and galaxy surveys [PDF]

, 2006
In this thesis, we exploit the potential of existing QSO and galaxy surveys for investigating the nature of the large scale structure in the Universe. A detailed analysis of clustering and redshift- space distortions allows us to constrain cosmological ...
Cruz da Angela, José Antonio, José Antonio Cruz da Angela   +1 more
core